212121111099 has 8 divisors (see below), whose sum is σ = 282830599440. Its totient is φ = 141412848416.

The previous prime is 212121111079. The next prime is 212121111107. The reversal of 212121111099 is 990111121212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212121111099 - 2⁵ = 212121111067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212121111049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233137 + ... + 691805.

It is an arithmetic number, because the mean of its divisors is an integer number (35353824930).

Almost surely, 2^212121111099 is an apocalyptic number.

212121111099 is a deficient number, since it is larger than the sum of its proper divisors (70709488341).

212121111099 is a wasteful number, since it uses less digits than its factorization.

212121111099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612829.

The product of its (nonzero) digits is 648, while the sum is 30.

It can be divided in two parts, 21212 and 1111099, that added together give a palindrome (1132311).

The spelling of 212121111099 in words is "two hundred twelve billion, one hundred twenty-one million, one hundred eleven thousand, ninety-nine".